Once the cake is cool enough to tip out of the pan, speed the cooling process by placing it in the freezer for 10 to 15 minutes.
To get that beautiful icing drizzle, make sure you test your icing for the perfect consistency by placing a small spoonful on top of the cake, then waiting to see if it will gently flow down the side of the cake after a minute or so. If it stays on top of the cake, thin the icing slightly with a bit of milk. If it runs down the sides of the cake in puddles at the bottom of your plate, add powdered sugar, 1 tablespoon at a time, to the icing mixture to thicken it up.
Allow your icing to set for 15 to 20 minutes before adding the decorations. This will help them stay in place.